// sum_arr1.c -- sums the elements of an array
// use %u or %lu if %zd doesn't work
#include <stdio.h>
#define SIZE 10
int sum(int ar[], int n);
int main(void)
{
	int marbles[SIZE] = { 20, 10, 5, 39, 4, 16, 19, 26, 31, 20 };
	long answer;

	answer = sum(marbles, SIZE);
	printf("The total number of marbles is %ld.\n", answer);
	printf("The size of marbles is %zd bytes.\n",
		sizeof marbles);

	return 0;
}

int sum(int ar[], int n)	// how big an array?
{
	int i;
	int total = 0;

	for (i = 0; i < n; i++)
		total += ar[i];
	printf("The size of ar is %zd bytes.\n", sizeof ar);

	return total;
}